Eminent Technology ET-2 Tonearm Owners

Some ''priviledges'' of ''knowing kinds''  are very curious. My  experience

with ''communist security paranoia''' about their own security can  be

comapared with '' Western paranoia'' about so called ''private security''.

The suggestion is ''for you and me''. Two of my contributions are

delited in two days time , obviously by some '' considerate members''. 

I was able to avoid communsit kind and think to be able to avoid ''Western

kind'' . This is my last contribution to this forum.

Is there anybody reading here, who is experienced in modeling mechanical systems as equivalent electronical circuits?

I was not able yet to figure out the equiv. circuit for the (horizontal) 4th order system tonearm / decoupled counter weight myself. I think this could be very helpful in understanding and optimizing the setup.

The longer i-beam allows much lower resonance frequencies ie. potentially a wider tuning range.
Intuitively, tuning the counterweight res. +\- precisely to the spindle/arm/cartridge resonance and optimizing the damping should „drain“ the main resonant energy, as shown in certain plots of the decoupled Dual counterweights in the 70s.
I‘d like to see and play with these interactions in a quicker, less time-consuming medium than the actual tt setup (with measurements another PITA).

I was able to optimize the mechanical panel resonance of aMaggie MG 3 and MG 3.3 in a similar way, but kind of a hybrid mechanical/electrical filter. It worked :-)

@nandric
your posts and experiences with audio are still appreciated. The removal of the post has nothing to do with paranoia, neither western or communist. It‘s only about keeping the spam cleaning task if the moderator low, by removing trigger words for bots.

@pegasus
that is an interesting comment

The longer i-beam allows much lower resonance frequencies ie. potentially a wider tuning range.

With my ET 2.5 and the long I Beam matching the bass response (punchy and tight) same as digital and 15 IPS was easier. So there is definitely a tuning advantage. I attributed this to the increased vertical inertia. I have asked Bruce for comment as well.

Re: Room tuning
I have always considered the bass the most important aspect of any room tuning because if you get it right the rest falls into place. With full range speakers and a dedicated room I always place the speakers on one of the room’s bass nodes. If the room is not too large, these nodes can be found easily without software, just by getting on your knees with bass playing. If your wife walks in while doing this man oeuvre just say you lost something in the carpet, then ask her for help to move the speaker.
Subwoofers are easier and placed beside the listening position - this is a big advantage as the Sub DB levels can be turned down really low. Very easy to room tune.
For full range speakers, in my previous room (longer, rectangular) and shooting down the length of the room, the bass nodes occurred every about every third in the room.
So that is where the speakers were placed on the first third.